Interesting stuff! Thanks for the input guys.
According to the above formula, a 257 Wby is good for 630 rounds assuming a 72 grain powder charge. That's assuming a cartridge with a 34 grain powder charge is good for 3000 rounds.
The reason I was concerned is that my gunsmith has experience with 257 Wby barrels being badly worn after 300 rounds, and believe me when I say this guy knows what he's talking about. In his words, the 257 is a fine way to go, because if I'm not happy with it I won't have to put up with it for very long as it'll soon be ready for the next barrel anyway! <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />
As this rifle won't get used a lot other than field shooting at deer, the 257 sounds like a great way to go. I'll hopefully work up a load with the 100 XLC or 3-X, and then not shoot it much except for hunting. But the 270 Wby and 7 Rem are tempting as well...
